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Some remarks on averaging and integral manifolds in evolutionary equations. (English) Zbl 0425.34048
Proc. asympt. Theory nonlin. Oscill., Acad. Sci. Ukr. SSR, Inst. Math., 250-257 (1977).

34C29 Averaging method for ordinary differential equations
34C30 Manifolds of solutions of ODE (MSC2000)
34D20 Stability of solutions to ordinary differential equations